C++ ref learn by doing

#cpp   #c++  

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Table of Content

• Ref are just reference to variable
• unlike pointer reference can’t contain NULL value, they must reference to some variable
• They can’t reassign, they don’t have memory allocate for them

#include <iostream>

#define LOG(x) std::cout << x << std::endl;

int main() {
    int a = 5;
    int& ref = a;
    ref = 2;
    LOG(a);
}

pass veritable as a reference to function

#include <iostream>

#define LOG(x) std::cout << x << std::endl;

void counter(int& counter)
{
    counter++;
}

int main() {
    int a = 5;
    counter(a);
    LOG(a);
}